<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="roleList" border scripte>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop': '', 'vcenter']"
                                v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item3.id)">{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for 循环嵌套渲染二级权限 -->
                                <el-row v-for="(item2, i2) in item1.children" :key="item2.id"
                                        :class="[i2 === 0 ? '': 'bdtop', 'vcenter']">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item3.id)">
                                            {{item2.authName}}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" closable v-for="(item3, i3) in item2.children"
                                                :key="item3.id" :class="[i3 === 0 ? '': 'bdtop']"
                                                @close="removeRightById(scope.row, item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini"
                                   @click="roleShowEditDialog(scope.row.id)">编辑
                        </el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini"
                                   @click="removeRoleById(scope.row.id)">删除
                        </el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">
                            分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色区域 -->
        <el-dialog title="添加角色" :visible.sync="addRoleVisible" width="50%" @close="addDialogClosed"
                   :close-on-click-modal="false">
            <el-form ref="addRoleFormRef" :model="addRoleForm" label-width="80px" :rules="addRoleRules">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色对话框 -->
        <el-dialog title="修改角色" :visible.sync="editRoleVisible" width="50%" @close="editDialogClosed"
                   :close-on-click-modal="false">
            <el-form ref="editRoleFormRef" :model="editRoleForm" label-width="80px" :rules="editRoleRules">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限对话框 -->
        <el-dialog title="修改角色" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed"
                   :close-on-click-modal="false">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all
                     :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
    export default {
        name: "Roles",
        data() {
            return {
                // 所有角色列表数据
                roleList: [],

                // 控制添加角色按钮的展示和隐藏
                addRoleVisible: false,

                // 添加角色表单数据数据
                addRoleForm: {
                    roleName: '',
                    roleDesc: ''
                },

                // 添加角色表单数据校验
                addRoleRules: {
                    roleName: [
                        {required: true, message: '请输入角色名称', trigger: 'blur'},
                    ]
                },

                // 控制修改角色的弹出框的展示和隐藏
                editRoleVisible: false,

                // 修改角色表单数据
                editRoleForm: {},

                // 修改角色表单数据校验
                editRoleRules: {
                    roleName: [
                        {required: true, message: '请输入角色名称', trigger: 'blur'},
                    ]
                },

                // 控制分配权限的弹出框的展示和隐藏
                setRightDialogVisible: false,

                // 所有权限的数据
                rightsList: [],

                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },

                // 默认选中的节点id值
                defKeys: [],

                // 当前即将分配权限的角色id
                roleId: ''
            }
        },
        methods: {
            async getRolesList() {
                const {data: res} = await this.$http.get('roles')

                if (res.meta.status !== 200) {
                    this.$message.error('获取角色列表失败')
                }
                this.roleList = res.data;

                // console.log(this.roleList);

            },

            // 关闭增加角色弹窗事件
            addDialogClosed() {
                this.$refs.addRoleFormRef.resetFields()
            },

            // 点击按钮，添加角色
            addRole() {
                // 提交添加角色前  预校验
                this.$refs.addRoleFormRef.validate(async valid => {
                    if (!valid) return;
                    // 发送请求
                    const {data: res} = await this.$http.post('roles', this.addRoleForm);
                    if (res.meta.status !== 201) {
                        return this.$message.error('添加角色失败')
                    }
                    this.$message.success('添加角色成功');
                    // 关闭弹出框
                    this.addRoleVisible = false;
                    // 重新获取角色数据
                    this.getRolesList()
                })
            },

            // 点击编辑，修改角色
            async roleShowEditDialog(id) {
                const {data: res} = await this.$http.get('roles/' + id);
                if (res.meta.status !== 200) {
                    return this.$message.error(this.meta.msg)
                }
                this.editRoleForm = res.data
                this.editRoleVisible = true
            },

            // 关闭修改角色弹窗事件
            editDialogClosed() {
                this.$refs.editRoleFormRef.resetFields()
            },

            // 修改角色点击确定按钮事件
            editRole() {
                this.$refs.editRoleFormRef.validate(async valid => {
                    if (!valid) return;
                    // console.log(this.editRoleForm);
                    const {data: res} = await this.$http.put('roles/' + this.editRoleForm.roleId, {
                        roleName: this.editRoleForm.roleName,
                        roleDesc: this.editRoleForm.roleDesc
                    });
                    // console.log(res)
                    if (res.meta.status !== 200) {
                        return this.$message.error(res.meta.msg)
                    }
                    this.$message.success(res.meta.msg);
                    // 关闭弹窗
                    this.editRoleVisible = false;
                    // 重新获取角色列表
                    this.getRolesList();

                    // console.log(res)
                })
            },

            // 删除角色按钮
            async removeRoleById(id) {
                const confirmResult = await this.$confirm('是否删除该角色?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: "warning"
                }).catch(err => {
                    return err
                });

                if (confirmResult === 'cancel') {
                    return this.$message.info('已取消操作')
                }
                const {data: res} = await this.$http.delete('roles/' + id)

                if (res.meta.status !== 200) {
                    return this.$message.error(res.meta.msg)
                }
                this.$message.success(res.meta.msg)

                this.getRolesList()
            },

            // 根据Id删除对应的权限
            async removeRightById(role, rightID) {
                // 弹框提示
                const confirmResult = await this.$confirm('是否删除', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => {
                    return err
                })

                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除')
                }

                const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightID}`)

                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败')
                }

                // this.getRolesList()
                role.children = res.data
            },

            // 展示分配权限的对话框
            async showSetRightDialog(role) {
                this.roleId = role.id
                // 获取全部权限的数据
                const {data: res} = await this.$http.get('rights/tree');

                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限失败')
                }
                // 把获取到的权限数据保存到data中
                this.rightsList = res.data;
                // console.log(this.rightsList)

                // 递归获取三级节点的Id
                this.getLeafKeys(role, this.defKeys)
                this.setRightDialogVisible = true
            },

            // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
            getLeafKeys(node, arr) {
                // 如果当前node节点不包括children属性，则是三级节点
                if(!node.children) {
                   return arr.push(node.id)
                }
                node.children.forEach(item => {
                    this.getLeafKeys(item, arr)
                })
            },

            // 监听分配权限对话框的关闭事件
            setRightDialogClosed() {
                this.defKeys = []
            },

            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    this.$refs.treeRef.getCheckedKeys(),
                    this.$refs.treeRef.getHalfCheckedKeys()
                ]
                console.log(keys)
                const idStr = keys.join(',');

                const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {
                    rids: idStr
                })

                if(res.meta.status !== 200){
                    return this.$message.error('分配权限失败')
                }
                this.$message.success('分配权限成功')

                this.getRolesList()

                this.setRightDialogVisible = false
            }
        },
        created() {
            this.getRolesList()
        }
    }
</script>

<style scoped>
    .el-tag {
        margin: 7px;
    }

    .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee;
    }

    .vcenter {
        display: flex;
        align-items: center;
    }
</style>